Rock-tunneling machine



A. E. CARLSON ROCK TUNNELINGMACHINE Feb. 21, 192s. l

lFiled Feb.' 6. 1926 JNVENToR.

ATTORNEY.

Patented Feb. 21, 1928.

ANTHONY E. canteen, or Los ANGELES., CALIFORNIA.

.BooK-TUNNELING MACHINE.

Application filed February My invention relates to tunneling machinesand more particularly to a, machine for cutting and tunneling throughrock.

AThe general object of my invention is to provide a fast, economicalandhighly eilicent machine for cutting and tunneling through rock.

Other objects and advantages will appear hereinafter.

My invention is illustrated in the annexed drawing which forms a part ofthis rspeci-V fication and in which Fig. 1 is a vertical longitudinalsection of Vmy tunneling machine taken'on line 1-1 of Fig. 3. 1 A Y Fig.2 is a transverse vertical section'of my tunneling machine taken on line2-2 oflig. 1. i .i

Fig. 3 is a rear end view of my tunneling machine. I

Fig. 4 is a transverse sectional view of one of the bits and itsmounting taken on line 4-4 of Fig. 1. Y Y

Corresponding reference characters designate the same parts in all thefigures;

in the dra-wing 1 designates a carriage including a cylindrical body 2mounted on. wheels 3 which are mounted about 60 degrees apart and radialto the center of the body, so as to travel along the lower wall of thebore B, cut by the machine, and maintain the body in axial coincidencewith the bore. Radial screw jacks 4 are also mounted on the exterior ofthe body 2 about 90 degrees apart for engaging the bore and securing thecarriage 1 in the bore at progressive points Vduring the boringoperation. The cylinder2 is formed withvan external cylindrical wall 5,an internal cylindrical wall 6 spaced within said external wall andforming a space 7 therebetween, end walls 8 and 9, walls 10 and 11spaced inwardly from said end walls respectively and forming spaces 12and 13 therebetween, and two pairs of partition walls 14 and 15, thewalls of each partition being spaced and forming spaces 16 and 17therebetween. The walls 8, 9, 10, 11, 14 and 15 are provided with Ycentral openings 18.

A plurality of screw rods 20, 21, 22, 23 and 24 spaced equi-distantapart extend longitudinally through the annular space 7 and the endwalls 8 and 9 of the body 2 and carry on their forward ends a drill head25 which is provided with a central opening 26 and is formed with anannular flange joure, 192e. seri'ai No. 86,630.

nal 27 on its forward side coaxial withV the body and its openings 18. Abit head'28 is provided with a central opening 28 andan annular groovebearing 29 which receives the journal 27 whereby the bit head isjournaled to turn on the drill head. The journal 27 may be formed at itsouter end with an internal annular flange 30 and a ring 31 may besecured on the inner'face of the bit head 25 for lengaging the flange 30to prevent the bit head pulling off the drill head. The bit head 28 isformed with dovetailed ways 32 and 33 in which dovetailed bit bearings34 and 35 are slidably mounted. In the bearings 34'and 35 are journaledrotary bits 36 and 37 respectively formed with spaced annular cuttingedges 38. The ways 32 and 33 Vare arranged' at oppositely disposedyangles to the axis of the bit head so that the bit 36 will cut anexternal conical-surface at the end of the bore from a small circle cconcentric with the bore B to a circle 0 midway between the circle c andthe circumference of the bore and willv leave al concentricA core Cwithin the circle c, while the bit 37 will cut an internalcnical surfaceb on the end of the bore from the circle 0 to theV circumference of thebore. Threaded' lugs 39 and 40 are formed on the bearings 34 and andscrews 41 and 42 are mounted in the ways 32 Vand 33 Vin engagement withsaid lugs respectively for adjusting the cutter 36 tov cut a larger. orsmaller core C -and for adjusting the cutter 36 to cut a larger orsmaller core G andfor adjusting the cutter 37 for cutting a larger orsmaller bore B.

The screw rods 2.0 to 24 inclusive are `journaled at their forward endsin bearings 43 in the front end wall `8 andextend through and Vare inthreaded engagement at their rear ends with threaded sleeves 44journaled in bearings 44 on the rear end of the body 2, on which sleevesare sprockets 45 over which extends a chain 46 so that when the sleeveengaging rod 2O is rotated all of the sleeves are turned and all of therods 2O to 24 inclusive, together with the drill head 25, bit head 28and the bits 36 and 37, are moved in or out with relation to thecarriage 1. On the sleeve 44 which engages the rod 20, is formed a wormgear47 which engages a worm 48 on the shaft 49 of a motor 50 mounted onthe rear end of the carriage body 2.

On the rear end ofthe carriage body 2 in a bearing 51 is journaled asleeve 52 provided with a square bore 53. O n the sleeve 52 is formed aworin` gear 54 which meshes with' a worin 55 on the shaft 56 of a motor57 mounted on the rear end of the 'carriage body 2. In a bearing 5S onthe drill head is journaled the forward end of a shaft 59,the rear endof said shaft being square and in sliding engagement with; the squarebore 53 of the sleeve 52. On the forward end of the shaft 59 is secureda pinion 6l in mesh with a gear 62 on the bit head 2.8.

Shafts 65 are joii'rnaled in bearings 66 on the under side of the body2, on which shafts are wo'rins 67 which mesh with worm gears 68 on thewheels 3, and handles 69 are secured on `the rear ends of said shaftsfor mating the Same and the stetig s uireugh the mediumof said worms andgears whereby the carriage is 'caused t0I travel in and outof the boreB. I A n y The rotation ofthe sleeves 44 bythe motor 50 inovesvtherods20 Ato 24, drill head 25, bit head 28 and bits 36 and 37 forwardlyfor drilling when the carriage is secured in ui@ bore by the jacks i.,By reversing the motor 50 the 'bits 36 and l37 may be with drawn toadvance the carriage for the next drilling operation of the bits.

` Vlr/fiile the bits aieinoved forward they are also rotated by themotor Ythrough the inediuin of the worin 55, worin, gear 54, shaft 59,pinion 61gear 62 and bit head 28. The core Ck passes through theopeningsv28A in the bit head 28, opening in the drill head 25, andopenings'y i8 in the body walls 8, 9, l0, 1l, 14 and l5. Thecoi'e may beeasily broken oil' and removed from the machine.

Havii'ig thus described iny invention what l lclaini is: e

n l. A tiinneling machine comprising a carringe, 'apliirality o'f screwrods slidably jeiirnaled on `said carriage, a plurality of sleevesjournaled on the carriage in thread-- ed engagement with said rodsrespectively, sprockets on said sleeves, achain extending over saidsprockets, a motor on said carriage, means 'whereby one of said Sleevesis driven by said motor, a drill head mounted on the forwardends ofsaidscrew rods, a bit head rotatably mounted on said drill longitudinally, adrill head mountedentirely on the; forward ends of said rods,- a bithead rotatably mounted o n said drill head, bits mounted on said bithead, a gear on said bit head, a pinion shaft journaled insaid drillhead and slidably mounted in the carriage,

a pinion on said shaft in mesh with saidVVV gear shaft.

3. A tunneling and means for rotating said pinion machine comprising a'carriage, a plurality ofl screw rods slidably` journaled on saidcarriage, ya plurality of sleeves journaled on the carriage in threadedengagement with said rods respectively, sprockets on said sleeves, achain extending over said sprockets,-ineans for driving'one of saidsleeves, a drill head mountedentirely on the forward ends of said screwrods', a bit head rotatably mounted on said drill head, bits mounted onsaid bit head, and means for rotating said bit-V head.

4. A tunneling machine comprisingfal earriage, a plurality of screw rodsslidably journaled 0n said carriage, la plurality of sleeves journaledon the carriage in threaded engagement with said rods respectively,sprockets on said sleeves, a cha-in extending over said sprockets, meansfor driving one of said sleeves, a drill head mounted on the forwardends of said screw rods, al bit headv rotatably mounted entirely on saiddrill head, bits mounted on saidbit head, a gear ony said bithead, apinionfshaft, a pinion on said pinion shaft in mesh with said gear, andmeans for rotating said pinion shaft.

, ln testimony Vwhereof l hereunto aiiix my signature. v. i v

ANTHONY E. CARLSON.

CIV

